<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!--2. 为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 750px;height:400px;"></div>
    </el-card>
  </div>
</template>

<script>
// 1.导入 echarts
import echarts from "echarts";

import _ from 'lodash'

export default {
  data() {
    return {
        //需要合并的数据
    options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
    }
        
      };
  },
  created() {},
  //3. 此时，页面上的元素，已经被渲染完毕了！（ 只要执行到了mounted函数，就证明DOM元素被初始化完毕了，
  async mounted() {
      // 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

        const { data:res } = await this.$http.get('reports/type/1')
        if (res.meta.status !== 200) {
            return this.$message.error('获取折线数据失败！')
        }
    //4.准备数据和配置项
     // 指定图表的配置项和数据
     //copy合并
     const result = _.merge(res.data,this.options)
       
    //5.展示数据
    myChart.setOption(result)
  },
  methods:{}
};
</script>

<style lang="less" scoped>
</style>